2017A&A...598A.127H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST23:20:50

2017A&A...598A.127H - Astronomy and Astrophysics, volume 598A, 127-127 (2017/2-1)

Generalizing MOND to explain the missing mass in galaxy clusters.

HODSON A.O. and ZHAO H.

Abstract (from CDS):

Context. MOdified Newtonian Dynamics (MOND) is a gravitational framework designed to explain the astronomical observations in the Universe without the inclusion of particle dark matter. MOND, in its current form, cannot explain the missing mass in galaxy clusters without the inclusion of some extra mass, be it in the form of neutrinos or non-luminous baryonic matter. We investigate whether the MOND framework can be generalized to account for the missing mass in galaxy clusters by boosting gravity in high gravitational potential regions. We examine and review Extended MOND (EMOND), which was designed to increase the MOND scale acceleration in high potential regions, thereby boosting the gravity in clusters.
Aims. We seek to investigate galaxy cluster mass profiles in the context of MOND with the primary aim at explaining the missing mass problem fully without the need for dark matter.
Methods. Using the assumption that the clusters are in hydrostatic equilibrium, we can compute the dynamical mass of each cluster and compare the result to the predicted mass of the EMOND formalism.
Results. We find that EMOND has some success in fitting some clusters, but overall has issues when trying to explain the mass deficit fully. We also investigate an empirical relation to solve the cluster problem, which is found by analysing the cluster data and is based on the MOND paradigm. We discuss the limitations in the text.

Abstract Copyright: © ESO, 2017

Journal keyword(s): gravitation - galaxies: clusters: general

Simbad objects: 14

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Number of rows : 14

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 133 ClG 01 02 39.0 -21 57 15           ~ 336 1
2 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5134 1
3 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 652 1
4 ACO 383 ClG 02 48 06.9 -03 29 32           ~ 297 0
5 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 467 0
6 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 115 0
7 ACO 1413 ClG 11 55 18.0 +23 24 19           ~ 381 0
8 ClG J1159+5531 ClG 11 59 51.1 +55 31 56     15.64     ~ 85 1
9 NAME NGC 4073 Group GrG 12 04 21.7 +01 50 19     13.53     ~ 245 0
10 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5824 0
11 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1154 0
12 ACO 1991 ClG 14 54 30.2 +18 37 51           ~ 306 1
13 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 852 0
14 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 625 2

    Equat.    Gal    SGal    Ecl

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2020.07.03-23:20:50

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